Door-bolt.



No. 629,060. Patented July 18, 1899. 7

A. G. BAYLES.

D008 BOLT.

(Application filed Mar. 16, 1899.)

(No l lodal.)

. Fig.3 FIG. 1.

Tm: noun m ca. PHOTO-THO? 71mm, 0. c4

' sorted in the hole 10 of the bolt 9.

i UNITED, STATES PATENT OFFICE.

' ALFRED G. BAYLES, OFlNEV YORK, N. Y.

noon-Bo LT.

SIE ECIFICATION forming part of Letters Patent No. 629,060, dated July18, 1899.

Application and March 16, 1399.

To all whom. it may concern.-

Be it known that I, ALFRED G. BA-YLES, a citizen of the United States,residing at New York, in the county and State of New York, have inventeda new and useful Door-Bolt, of which the following is a specification.

My invention relates to door-bolts, and especially to that class knownin the art to which it appertains as flush bolts, and has for its objectto provideineans to effectively lock the bolt, so that it cannot bethrown by an instrument inserted through a gimlet-hole in' the door. Iattain this object by means of the mechanism illustrated in theaccompanying drawings, in which- Figure 1 is a face View of a door-boltconstructed according to my improvement, the socket into which the endof the bolt is thrown beingomitted. Fig. 2 is a top plan View of thesame, and Fig. 3 is an end view thereof.

In the accompanying drawings like parts are designated by the samereference-numerals in each of the views, and inthe practice ofmyinvention I take an ordinary door-bolt, the plate of which isindicated by 5, whichis provided with the usual screw-holes, by which itmay be secured to a door, the housingsat each end of the plate beingindicated bylfi and the central housing by 7, which consists of twoflanges,which partly inclose the bolt 9, leaving the passage 8, throughwhich the shank of the bolt 11 may pass, all of these parts being'awell-known construction.

The bolt 9 is provided with a screw-threaded hole 10, in which I mount abolt 11, having a head 12 and a screw threaded shank 13. The shank 13 ispreferably smaller than the unthreaded part, whereby a shoulder 14 isformed, and between the threaded part 13 and the shoulder 14 is'preferably formed an annular groove 15, and the free end of the threadedpart is provided with a flange 16, which is preferably formed bypounding the free end of the bolt 11 with a hammer after the same is in-I prefer to so proportion the threaded part of the bolt 11 andtherecesses formed between the housing 7 and the housings 6 that whenthe bolt 11 is in the position shown in full lines in Fig. 8 there willbe aspace 17 between the said bolt and the bottom of the recesses, asclearly shown in Fig. 2. r I 7 Serial No. 709,361. No model.)

In operation the bolt 11 is unscrewed until the flange 16 will bearagainst the bolt 9, at which time the bolt 9 can be given a one-quarterturn, as is'common with this class of bolts,

and the bolt can be thrown in either direction by passing the bolt 11through the passage 8, as will be readily understood. When the bolt isthrown and the bolt 11 is in the position shown in full lines in Fig. 3,by screwing the same into the hole 10 the end of said bolt will projectupon the plate 5 and will prevent the turning of therbolt 9, so that thebolt 11 can pass through the passage 8. This will prevent the operationof the bolt 9 by boring a gimlet-hole through the door and throwing thebolt by means of a wire, as is occasionally done with bolts as nowconstructed.

The flange on the end of the bolt 11 will prevent the bolt being screwedout of the hole 10, and by forming the annular groove 15 between theshoulder 14 and the screw-threaded part 13 I am able to form a fullthread on said threaded part up to the annular groove 15, so that thebolt can be screwed in until the shout der 14 will bear against the bolt9 or housings ,6 and 7 without binding the screw.

By leavingthe space 17 between the end of the boltll and the bottom ofthe recess between tlie housings the boltll can be drawn :into theposition indicated bydotted lines in Fig; 3 before operating orunscrewing the said bolt, thereby giving more space for the "handbetween the head ofthe bolt and the door, as will be readily understood.

While I have described the most approved form in which my invention isconstructed, yet many changes of detail can be made without departingfrom the spirit of the same, such as providing other means instead ofthe groove to prevent the threads binding when.

the bolt is screwed home and the flange to prevent the bolt being turnedout of the hole 10. I also prefer that the thread on the bolt 11 shouldbe what is known as a fast thread, so that a half-turn or turn wouldcarry the end far enough to bind and lock the bolt; but this is notessential, and I therefore reserve the right to make any changes whichfairly come within the scope of my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is

formed, the central housing being divided transversely centrally thereofto connect the said recesses, a rotary and sliding bolt with ascrew-threaded hole therethrough mounted in said hou sings,ascrew-threaded bolt mounted in said hole, and projecting through one ofsaid recesses upon the said casing at its opposite ends when in a lockedposition, said last-namedbolt being provided at the free end of thescrew-threaded portion with means to prevent the same being screwed outof the said hole, and at the opposite end of said screw-threaded portionwith means to prevent the binding of the screw in the said hole whenscrewed in as far as the same will, go.

2. In a door-bolt, a casing provided with housings whereby two recessesare formed, the central housing being divided transversely centrallythereof to connect the said recesses, a rotary and sliding bolt having ascrew-threaded hole therethroughmounted in said housings,ascrew-threaded bolt mounted in said hole and adapted to project throughone of said recesses upon the said casing at its opposite ends when in alocked position, and being provided with an annular groove between thescrew-threaded part and the shoulder on said bolt, wherebybindin g ofthe screw in said hole is prevented, substantially as and for thepurpose described.

3. In a door-bolt, a casing provided with housings whereby two recessesare formed, the central housing being divided transversely centrallythereof to connect the said recesses, a rotary and sliding bolt having ascrew-threaded hole therethrough mounted in said housings,ascrew-threaded bolt mounted in said hole, and provided at one end with aflange to prevent the withdrawal of the same,

and also provided adjacent to the screw threaded portion with a shoulderto limit the inward motion of the bolt and with an annular groovebetween said screw-threaded portion and said shoulder whereby thebinding of the screw in said hole is prevented, said last-named boltprojecting through one of said recesses upon the said casing at itsopposite ends when in a locked position, said first named bolt beingcapable of being slid in said housings when said second bolt isunscrewed, the second bolt passing through the said transverse openingof the central housing, substantially as and for the purpose set forth.

In testimony that I claim the above I have hereto affixed my signaturein the presence of two witnesses.

ALFRED G. BAYLES.

Witnesses:

EDWARD WINsToN GEER, A. M. CUsAcK.

